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(NoMroc leL) H. (J. WEEDEN. AUTOMATIC FLUSHING DEVICE. No. 416,141. Patented Nov. 26, 1889.

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afm fim g flaw/5? mm l UNITED STATES PATE T OFFICE HEN RY C. \VEEDEN, OF 1308' ON, MASSACHUSET S, ASSIGNOR TO THE \VEEDEN SANITARY MANUFACTURING COMPANY, OF RHODE ISLAND.

AUTOMATIC FLUSHING DEVICE.

SPECIFICATION forming part of Letters Patent No. 416,141, dated November 26, 1889.

Application filed June 17, 1889. Serial No, 314,606. (No model.)

To all whom, it may concern.-

3e it known that I, HENRY O. WEEDEN, of Boston, in the county of Suffolk and State of l\f[assachusetts,a citizen of the United States,

5 have invented certain new and useful Improvements in Automatic Flushing Devices, of which the following is a specification.

My invention relates to that class of ap' paratus in which the flushing of the bowl of [o a urinal or similar structure is accomplished by means of the siphon action produced by the downward and outward passage through a pipe of suitable caliber of liquid introduced from without into the bowl.

In the accompanying drawing I have represented in elevation and section a device embodying my present invention in a convenient form.

In the drawing, A represents the bowl to be flushed, B the flushing'pipe leading thereto, and O the. tank or water-supply. Below the bowl I provide an outlet-pipe D, of suitable caliber, through which liquid poured into the bowl from without may pass out.

This pipe is provided with a back-air cut-off cl, and an overflow or surplus waste-pipe E may also be provided, as shown. The function of the back-air cut-off, as is well known, is to prevent air passing into the pipe D to supply the place of that driven out by the flow of liquid through the pipe.

In connection with the pipe D,and at a point on the sewer side of the back-air cutoif, I provide an air-pipe F, extending up- 3 5 wardly and terminating in a siphon within the tank. A branchf of the long leg of this siphon leads into a water-tight chamber G, formed within the tank, with which chamber the flushing-pipe B communicates by means of a water-way which is normally closed by a float-valve 9. As the normal waterlevel in this chamber is that of the top of the water-way into the flushingpipe B, it is obvious that the float-valve will normally close it. The flushing-pipe B may also be provided at its upper end with a siphon, (shown at 1-1,) although, as will be hereinafter pointed out, this last feature is not essential. \Vhen this siphon H is employed, and in order to regulate the amount of water discharged by it, its mouth may be inclosed within a chamber h, having a small orifice, this being a well-known device for this purpose.

The operation of the apparatus is as follows, the parts being represented in their normal condition: 'VVhen liquid is introduced iato the bowl from without, it passes down through the outlet-pipe D, displacing the air therefrom. This produces rarefaction of the air in the air-pipe F, thus setting its siphon in operation. A portion of the water drawn off by the siphon is conducted through the branch f into the chamber G, whereit rises to a height sufficient to float the valve 9 off its seat, thereby opening the waterway from the chamber into the flushing-pipe B. The water in the chamber will then descend through this pipe to flush the bowl until the level of the water in the chamber has been drawn down to that of the water-way, when the flow of water will cease and the valve g will be seated. As thesupply of flushing-water thus obtained would ordinarily be insufficient, a permanent flush of greater amount may be obtained by attaching a siphon H to the upper part of the flushing-pipe. The flow of water downwardly through the flushing-pipe will start the action of this siphon, which will continue until the withdrawal of the water uncovers its mouth.

It is obvious that to prevent air being drawn in through the branch pipe f from the chamber G, when the air is rarefied in the pipe F, this branch pipe f should be provided with a suitable back-air cut-off. For this purpose a flap-valve) may be placed upon the mouth of the branch pipe f within the chamber.

' I claim- 1. In an automatic flushing device for uri- 9o nals and similar structures, the combination, wit-h the bowl to be flushed, of a flushingpipe extending therefrom to the flushing-tank,

a watertight chamber in the tank, a waterway from the flushing-pipe to the interior of 5 this chamber, a float-valve normally closing the said water-way, a waste-pipe below the bowl having a back-air cut-off therein, and an air-pipe leading from the waste-pipe on the sewer side of the air cut-off upwardly to the tank and formed at its upper part into a siphon having its short leg communicating with the water in the tank and having a branch of its long leg leading to the interior of the said chamber.

2. In a device of the character described, the combination, with the bowl to be flushed, of a flushing-pipe extending therefrom to the flushing-tank,a Water-tight chamber in the tank, a water-way from the flushing-pipe to the interior of this chamber, a float-valve normally closing the said Water-way, a siphon H, connected with the flushing-pipe and communicating with the Water in the tank, a Waste-pipe below the bowl having a back-air cut-off therein, and an air-pipe leading from the waste-pipe on the sewer side of the air cutoff upwardly to the tank and formed at its upper part into a siphon having its short leg communicating with the Water in the tank and having a branch of its long leg leading to the interior of the said chamber.

In testimony whereof I have hereunto subscribed my name this 15th day of June, A. D. 1889.

HENRY C. WEEDEN. \Vitnesses:

ELLEN B. ToMLINsoN, JOHN H. TAYLOR. 

